JPH05296275A - Film body for air spring - Google Patents
Film body for air springInfo
- Publication number
- JPH05296275A JPH05296275A JP10123192A JP10123192A JPH05296275A JP H05296275 A JPH05296275 A JP H05296275A JP 10123192 A JP10123192 A JP 10123192A JP 10123192 A JP10123192 A JP 10123192A JP H05296275 A JPH05296275 A JP H05296275A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing
- air spring
- film body
- kgf
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Vehicle Body Suspensions (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は空気バネに使用される
空気バネ用膜体に係わり、更に詳しくは、繰り返しの反
転運動による抵抗力を高めて、補強層間及び補強層と埋
設された補強コードとの剥離を防止し、耐久性の向上を
図ることが出来る空気バネ用膜体に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air spring membrane used for an air spring, and more particularly, to a resistance cord due to repeated reversal movements to enhance a reinforcing cord between a reinforcing layer and a reinforcing layer. The present invention relates to a film body for an air spring, which is capable of preventing peeling from the film and improving durability.
【０００２】[0002]
【従来の技術】一般に、空気バネ用膜体は、自動車等の
車両用懸架装置の空気バネ等に用いられている。この車
両用懸架装置は、図７に示すように、シリンダ１０とピ
ストンロッド１１とからなる油圧緩衝器１２と、ピスト
ンロッド１１の周囲にその長手方向に沿って気密的に構
成された空気バネ１３とから構成されている。2. Description of the Related Art Generally, a film body for an air spring is used as an air spring of a suspension system for a vehicle such as an automobile. As shown in FIG. 7, the suspension device for a vehicle includes a hydraulic shock absorber 12 including a cylinder 10 and a piston rod 11, and an air spring 13 that is airtightly configured around the piston rod 11 along its longitudinal direction. It consists of and.
【０００３】この空気バネ１３は、ピストンロッド１２
の上端部にその頭部が装着された外筒１４と、下端部が
前記シリンダ１０に固定され、上端部が外側に折り返さ
れて外筒１４の下端部に固定された円筒状の空気バネ用
膜体１５とから構成されている。空気バネ用膜体１５
は、例えば、ナイロンコード等の補強コードが埋設され
た補強層を２層内層に有し、この２層積層された補強層
の両側にそれぞれカバー層が配置され、各層はＣＲ（ク
ロロプレン・ゴム）等の可撓性を有する材料から構成さ
れている。This air spring 13 has a piston rod 12
An outer cylinder 14 having its head attached to the upper end of the cylinder, and a cylindrical air spring having a lower end fixed to the cylinder 10 and an upper end folded back to the lower end of the outer cylinder 14. It is composed of a film body 15. Film body for air spring 15
Has a reinforcing layer in which a reinforcing cord such as a nylon cord is embedded in two inner layers, and a cover layer is arranged on each side of the two laminated reinforcing layers, and each layer is CR (chloroprene rubber). It is composed of a flexible material such as.
【０００４】この空気バネ用膜体１５は、懸架装置の変
位に伴い、小さな曲率半径を有した反転運動を繰り返す
ため、反転時の抵抗が少ない膜体剛性で、内部ロス（内
部発熱）の少ないことが要求されてきた。その結果、前
記材料は、低剪断弾性率で、かつ低損失弾性率のものが
使用されている。Since the air spring film 15 repeats the reversing motion having a small radius of curvature with the displacement of the suspension device, the film rigidity is small at the time of reversing, and the internal loss (internal heat generation) is small. Has been requested. As a result, the material has a low shear modulus and a low loss modulus.
【０００５】[0005]
【発明が解決しようとする問題点】しかしながら上述し
た空気バネ用膜体１５にあっては、繰り返しの反転運動
により、補強層相互、及び補強層と埋設さた補強コード
との間に剥離が発生し、耐久性に劣ると言う問題があっ
た。この発明はかかる従来の課題に着目して案出された
もので、繰り返しの反転運動による抵抗力を高めて、補
強層相互及び補強層と埋設された補強コードとの間の剥
離を有効に防止し、耐久性の向上を図ることが出来る空
気バネ用膜体を提供することを目的とするものである。However, in the above-described air spring film body 15, due to repeated reversal movement, peeling occurs between the reinforcing layers and between the reinforcing layers and the buried reinforcing cords. However, there was a problem that it was inferior in durability. The present invention was devised by focusing on such conventional problems, and effectively increases resistance to repeated reversal movements and effectively prevents separation between reinforcing layers and between a reinforcing layer and an embedded reinforcing cord. However, it is an object of the present invention to provide a film body for an air spring capable of improving durability.
【０００６】[0006]
【発明を解決するための手段】この発明は上記目的を達
成するため、補強コードが埋設された補強層の両側にカ
バー層を配置して成る可撓性の空気バネ用膜体の前記補
強層を、剪断弾性率１０〜１２kgf/cm2 、損失弾性率
０．３５〜０．４０kgf/cm2 、層間接着力４．０kgf/cm
以上の可撓性材料から構成したことを要旨とするもので
ある。In order to achieve the above-mentioned object, the present invention provides the above-mentioned reinforcing layer of a flexible air spring membrane body in which cover layers are arranged on both sides of a reinforcing layer in which a reinforcing cord is embedded. Shear elastic modulus of 10 to 12 kgf / cm 2 , loss elastic modulus of 0.35 to 0.40 kgf / cm 2 , and interlayer adhesive force of 4.0 kgf / cm 2 .
The gist of the invention is that it is made of the above flexible material.
【０００７】[0007]
【作用】この発明は上記のように構成され、補強コード
を埋設した補強層を、剪断弾性率が１０〜１２kgf/c
m2 、損失弾性率が０．３５〜０．４０kgf/cm2 、層間
接着力が４．０kgf/cm以上の可撓性材料から構成したの
で、小さな曲率半径を伴って繰り返される反転運動に対
する抵抗力が高まり、補強層相互及び補強層とこの補強
層に埋設された補強コードとの間の剥離を有効に防止
し、空気ゴム用膜体の耐久性の向上を図ることが出来
る。The present invention is constructed as described above, and the reinforcing layer in which the reinforcing cord is embedded has a shear modulus of 10 to 12 kgf / c.
m 2, 0.35~0.40kgf / cm 2 is the loss modulus, since the interlayer adhesiveness was formed from 4.0 kgf / cm or more flexible materials, resistance to alternating motion which is repeated with a small radius of curvature The strength is increased, and peeling between the reinforcing layers and between the reinforcing layers and the reinforcing cords embedded in the reinforcing layers can be effectively prevented, and the durability of the air-rubber membrane can be improved.
【０００８】[0008]
【実施例】以下、添付図面に基づいてこの発明の実施例
を説明する。図１は、この発明に係る空気バネ用膜体の
半断面図を示し、この空気バネ用膜体１は、中空の筒状
を成し、上端部１ａが図２に示すように、車両用懸架装
置Ｓのシリンダ１０の上端部にカシメリング１６により
固定され、末拡がり状の下端部１ｂが外側に折り返され
て外筒１４の下端部にカシメリング１７により固定され
るように構成されている。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a half cross-sectional view of a film body for an air spring according to the present invention. The film body for air spring 1 has a hollow cylindrical shape, and an upper end portion 1a thereof is for a vehicle as shown in FIG. The suspension device S is fixed to the upper end portion of the cylinder 10 by a crimping ring 16, and the flared lower end portion 1b is folded back to the outside and fixed to the lower end portion of the outer cylinder 14 by a crimping ring 17. ..
【０００９】前記空気バネ用膜体１は、図３に示すよう
に、内層に補強コードｃで補強された補強層２を２層有
し、この積層された２層の補強層２の両側に、この補強
層２を保護するためのカバー層３ａ，３ｂがそれぞれ配
置されている。前記補強層２は、ＣＲ等のゴム材料等か
ら成る可撓性を有する材料より構成され、この可撓性材
料は、剪断弾性率が１０〜１２kgf/cm2 で、損失弾性率
が０．３５〜０．４０kgf/cm2 である特性を有するもの
である。As shown in FIG. 3, the air spring film body 1 has two reinforcing layers 2 reinforced by a reinforcing cord c on the inner layer thereof, and the two reinforcing layers 2 are laminated on both sides. Cover layers 3a and 3b for protecting the reinforcing layer 2 are arranged respectively. The reinforcing layer 2 is made of a flexible material such as a rubber material such as CR, and the flexible material has a shear elastic modulus of 10 to 12 kgf / cm 2 and a loss elastic modulus of 0.35. It has a characteristic of about 0.40 kgf / cm 2 .
【００１０】剪断弾性率が１０kgf/cm2 未満及び１２kg
f/cm2 を越えると、小さな曲率半径を伴って繰り返され
る反転運動に対する抵抗力が低くなり、耐久性が悪化す
る。損失弾性率が０．３５kgf/cm2 未満及び０．４０kg
f/cm2 を越えても、上述同様抵抗力が低くなり耐久性が
悪化する。また、前記補強層２の可撓性材料は、補強コ
ードｃを埋設した状態での補強層２相互の接着力が４．
０kgf/cm以上の特性を有するものである。接着力が４．
０kgf/cm未満であると、やはり小さな曲率半径を伴って
繰り返される反転運動に対する抵抗力が低くなり、耐久
性が悪化する。Shear modulus less than 10 kgf / cm 2 and 12 kg
When it exceeds f / cm 2 , the resistance to repeated reversal movement with a small radius of curvature becomes low, and the durability deteriorates. Loss elastic modulus is less than 0.35 kgf / cm 2 and 0.40 kg
Even if it exceeds f / cm 2 , the resistance becomes low and the durability deteriorates as described above. Further, the flexible material of the reinforcing layer 2 has an adhesive force of 4. between the reinforcing layers 2 in the state where the reinforcing cord c is embedded.
It has characteristics of 0 kgf / cm or more. Adhesion is 4.
If it is less than 0 kgf / cm, the resistance to repeated reversal movement with a small radius of curvature also becomes low and the durability deteriorates.
【００１１】前記補強層２に埋設される補強コードｃ
は、従来同様に、ナイロンコード、ポリエステルコー
ド、アラミドコード等が用いられる。前記カバー層３
ａ，３ｂも、従来と同様で、低剪断弾性率で、かつ低損
失弾性率のＣＲ等の可撓性材料から構成されている。ま
た、以上のように構成された空気バネ用膜体１は、その
反転部１ｃが２．０〜３．０mmの肉厚を有するものが好
ましく、更に好ましくは、２．０〜２．５mmのものがよ
い。Reinforcing cord c embedded in the reinforcing layer 2
As in the conventional case, nylon cord, polyester cord, aramid cord, etc. are used. The cover layer 3
As in the conventional case, a and 3b are also made of a flexible material such as CR having a low shear modulus and a low loss modulus. Further, in the air spring film body 1 configured as described above, it is preferable that the inverted portion 1c has a wall thickness of 2.0 to 3.0 mm, and more preferably 2.0 to 2.5 mm. Things are good.
【００１２】肉厚が２．０mm未満では強度上の問題が生
じ、３．０mmを越えると耐久性が悪化する。肉厚が２．
０mm以上２．５mm以下において、良好な耐久性を示す。
以上のように、この発明は、補強コードｃを埋設した補
強層２を、剪断弾性率が１０〜１２kgf/cm2 、損失弾性
率が０．３５〜０．４０kgf/cm2 、層間接着力が４．０
kgf/cm以上の可撓性材料から構成するようにしたので、
小さな曲率半径を伴って繰り返される反転運動に対する
抵抗力を高めて、補強層２相互及び補強層２とこの補強
層２に埋設された補強コードｃとの間の剥離を有効に防
止し、空気ゴム用膜体１の耐久性の向上を図ることが出
来る。If the wall thickness is less than 2.0 mm, strength problems occur, and if it exceeds 3.0 mm, the durability deteriorates. The wall thickness is 2.
Good durability is exhibited in the range of 0 mm or more and 2.5 mm or less.
As described above, according to the present invention, the reinforcing layer 2 in which the reinforcing cord c is embedded has a shear elastic modulus of 10 to 12 kgf / cm 2 , a loss elastic modulus of 0.35 to 0.40 kgf / cm 2 , and an interlayer adhesive force. 4.0
Since it is made of a flexible material of kgf / cm or more,
The resistance to repeated reversal movements with a small radius of curvature is increased to effectively prevent peeling between the reinforcing layers 2 and between the reinforcing layers 2 and the reinforcing cords c embedded in the reinforcing layers 2, and air rubber The durability of the film body 1 can be improved.
【００１３】また、空気ゴム用膜体の他の特性である転
動フリクションを従来同様に有するため、空気ゴム用膜
体１の総合的な性能の向上を図ることも出来るのであ
る。次に、上述した構造（補強層２層とその両側に配置
したカバー層２層）よりなる空気バネ用膜体の補強層の
剪断弾性率、損失弾性率、及び補強コードが埋設された
補強層相互の接着力を変えた際の、空気バネ用膜体の耐
久性試験の測定結果を図４、図５、図６に示す。但し、
各試験共、空気バネ用膜体は同一形状であり、そのサイ
ズは、転動径５０．８mm、試験条件は、３．０Hz×±５
０mm×内圧９kgf/cm2 ×温度８０℃×内容積５５０ccで
ある。補強コードにはナイロンコードを使用している。
カバー層は低剪断弾性率で、かつ低損失弾性率のＣＲか
ら構成されている。Further, since the rolling friction, which is another characteristic of the air-rubber film body, is provided as in the conventional case, the overall performance of the air-rubber film body 1 can be improved. Next, the shear elastic modulus, the loss elastic modulus, and the reinforcing layer of the reinforcing layer of the reinforcing layer of the air spring membrane having the above-described structure (two reinforcing layers and two cover layers arranged on both sides thereof). The measurement results of the durability test of the film body for air spring when the mutual adhesive force is changed are shown in FIGS. 4, 5 and 6. However,
In each test, the film body for air spring has the same shape, its size is rolling diameter 50.8mm, test condition is 3.0Hz × ± 5
0 mm × internal pressure 9 kgf / cm 2 × temperature 80 ° C. × internal volume 550 cc. Nylon cord is used for the reinforcing cord.
The cover layer is composed of CR having a low shear modulus and a low loss modulus.
【００１４】図４から明らかなように、補強層の剪断弾
性率が１０kgf/cm2 未満、及び１２kgf/cm2 を越える
と、空気バネ用膜体の耐久性能が２次曲線的に低下して
いくのが判る。また、図５から明らかなように、補強層
の損失弾性率が０．３５未満、及び０．４０kgf/cm2 を
越えると、やはり空気バネ用膜体の耐久性能が低下する
ことが判る。[0014] As is apparent from FIG. 4, the shear modulus is less than 10 kgf / cm 2 of the reinforcing layer, and when it exceeds 12 kgf / cm 2, durability of the air spring membrane body is reduced quadratic curve manner I can go. Further, as is clear from FIG. 5, when the loss elastic modulus of the reinforcing layer is less than 0.35 and exceeds 0.40 kgf / cm 2 , the durability of the air spring membrane is also deteriorated.
【００１５】また、図６から明らかなように、補強層の
接着力が４．０kgf/cm未満であると、空気バネ用膜体の
耐久性能が大幅に低下し始めることが判る。なお、図４
〜６の中で点Ａ、点Ｂ、点Ｃは、それぞれこの発明の実
施例１、従来例１、及び従来例２を示し、その補強層に
使用された可撓性材料の配合内容を下記の表１に示す。
表中の実施例２は、この発明の他の配合内容である。表
中の各数字の単位はｇである。Further, as is clear from FIG. 6, it can be seen that if the adhesive strength of the reinforcing layer is less than 4.0 kgf / cm, the durability of the air spring membrane will start to drop significantly. Note that FIG.
6 to 6, points A, B, and C represent Example 1, Conventional Example 1, and Conventional Example 2 of the present invention, respectively, and the content of the flexible material used for the reinforcing layer is described below. Is shown in Table 1.
Example 2 in the table is another formulation content of the present invention. The unit of each number in the table is g.
【００１６】 [0016]
【００１７】上述した実施例では、空気バネ用膜体１が
補強コードｃを埋設した補強層２を２層有する場合を説
明したが、上述した実施例に限定されることなく、他の
態様、例えば補強層２を１層、あるいは３層有する場合
等であってもこの発明を実施しうるものである。In the above-described embodiment, the case where the air spring film body 1 has the two reinforcing layers 2 in which the reinforcing cords c are embedded has been described, but the present invention is not limited to the above-described embodiment, and other aspects, For example, the present invention can be carried out even when the reinforcing layer 2 has one layer or three layers.
【００１８】[0018]
【発明の効果】この発明は上記のように構成され、補強
コードを埋設した補強層を、剪断弾性率が１０〜１２kg
f/cm2 、損失弾性率が０．３５〜０．４０kgf/cm2 、層
間接着力が４．０kgf/cm以上の可撓性材料から構成した
ので、小さな曲率半径を伴って繰り返される反転運動に
対する抵抗力を高めて、補強層相互及び補強層とこの補
強層に埋設された補強コードとの間の剥離を有効に防止
し、空気ゴム用膜体の耐久性の向上を図ることが出来る
効果がある。また、空気ゴム用膜体の他の特性である転
動フリクションを従来同様に有するため、空気ゴム用膜
体の総合的な性能の向上を図ることが出来る効果があ
る。The present invention is constructed as described above, and the reinforcing layer having the reinforcing cord embedded therein has a shear modulus of 10 to 12 kg.
f / cm 2 , loss elastic modulus is 0.35 to 0.40 kgf / cm 2 , and interlayer adhesive strength is 4.0 kgf / cm or more, so it is composed of a flexible material, so it has a reversing motion with a small radius of curvature. It is possible to improve the durability of the air-rubber membrane by effectively increasing the resistance to air and effectively preventing separation between the reinforcing layers and between the reinforcing layers and the reinforcing cords embedded in the reinforcing layers. There is. Further, since the rolling friction, which is another characteristic of the air-rubber film body, is provided as in the conventional case, there is an effect that the overall performance of the air-rubber film body can be improved.
【図１】この発明に係る空気バネ用膜体の半断面図であ
る。FIG. 1 is a half sectional view of a film body for an air spring according to the present invention.
【図２】空気バネ用膜体を車両懸架装置に装着した際の
半断面説明図である。FIG. 2 is a half cross-sectional explanatory view when the film body for an air spring is attached to a vehicle suspension device.
【図３】空気バネ用膜体の構造を説明する説明図であ
る。FIG. 3 is an explanatory diagram illustrating a structure of a film body for an air spring.
【図４】剪断弾性率と耐久回数との関係を示すグラフ図
である。FIG. 4 is a graph showing the relationship between shear modulus and the number of times of durability.
【図５】損失弾性率と耐久回数との関係を示すグラフ図
である。FIG. 5 is a graph showing the relationship between loss elastic modulus and the number of times of durability.
【図６】接着力と耐久回数との関係を示すグラフ図であ
る。FIG. 6 is a graph showing the relationship between the adhesive force and the number of times of durability.
【図７】車両用懸架装置の説明図である。FIG. 7 is an explanatory diagram of a vehicle suspension device.
１ 空気バネ用膜体 ２ 補強層 ３ａ，３ｂ カバー層 Ｓ 車両懸架装置 ｃ 補強コード 1 Air Spring Membrane 2 Reinforcement Layers 3a, 3b Cover Layer S Vehicle Suspension Device c Reinforcement Cord
Claims (1)
カバー層を配置して成る可撓性の空気バネ用膜体におい
て、前記補強層が、剪断弾性率１０〜１２kgf/cm2 、損
失弾性率０．３５〜０．４０kgf/cm2 、層間接着力４．
０kgf/cm以上の可撓性材料から構成されたことを特徴と
する空気バネ用膜体。1. A flexible film body for an air spring, comprising cover layers arranged on both sides of a reinforcing layer in which a reinforcing cord is embedded, wherein the reinforcing layer has a shear elastic modulus of 10 to 12 kgf / cm 2 and a loss. Elastic modulus 0.35 to 0.40 kgf / cm 2 , interlayer adhesive strength 4.
A film body for an air spring, which is made of a flexible material of 0 kgf / cm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10123192A JPH05296275A (en) | 1992-04-21 | 1992-04-21 | Film body for air spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10123192A JPH05296275A (en) | 1992-04-21 | 1992-04-21 | Film body for air spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05296275A true JPH05296275A (en) | 1993-11-09 |
Family
ID=14295128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10123192A Pending JPH05296275A (en) | 1992-04-21 | 1992-04-21 | Film body for air spring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05296275A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008132641A (en) * | 2006-11-28 | 2008-06-12 | Bridgestone Corp | Cylindrical flexible film body |
| US8382080B2 (en) | 2008-08-11 | 2013-02-26 | GM Global Technology Operations LLC | Cord reinforced resilient membrane |
| JP2013155248A (en) * | 2012-01-27 | 2013-08-15 | Bridgestone Corp | Rubber composition for air spring |
| JP2013155249A (en) * | 2012-01-27 | 2013-08-15 | Bridgestone Corp | Rubber composition for air spring |
| JP2019074181A (en) * | 2017-10-19 | 2019-05-16 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Air spring |
-
1992
- 1992-04-21 JP JP10123192A patent/JPH05296275A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008132641A (en) * | 2006-11-28 | 2008-06-12 | Bridgestone Corp | Cylindrical flexible film body |
| US8382080B2 (en) | 2008-08-11 | 2013-02-26 | GM Global Technology Operations LLC | Cord reinforced resilient membrane |
| JP2013155248A (en) * | 2012-01-27 | 2013-08-15 | Bridgestone Corp | Rubber composition for air spring |
| JP2013155249A (en) * | 2012-01-27 | 2013-08-15 | Bridgestone Corp | Rubber composition for air spring |
| JP2019074181A (en) * | 2017-10-19 | 2019-05-16 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Air spring |
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